Math Problem Statement
f(x)=1/(x-1)first principles
Solution
To find the derivative of using first principles, we use the definition of the derivative:
For , let's substitute and simplify step by step.
Step 1: Apply the difference quotient formula
This simplifies to:
Step 2: Simplify the difference between the two fractions
To combine the two fractions in the numerator, find a common denominator:
Simplifying the numerator:
Step 3: Simplify the expression
Now, cancel the in the numerator and denominator:
Step 4: Take the limit as
Now, substitute into the remaining expression:
Final Answer:
Thus, the derivative of using first principles is:
Would you like further clarification or more details?
Relative Questions:
- How does the derivative of a rational function typically behave?
- What is the general process of finding a derivative using first principles?
- Can you explain why the common denominator is necessary when simplifying the difference of two fractions?
- How does the first principles method compare to using derivative rules like the quotient rule?
- What happens when in the function ?
Tip:
When dealing with rational functions, always check for undefined points (like when the denominator is zero) before applying differentiation rules.
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Math Problem Analysis
Mathematical Concepts
Calculus
Limits
Derivatives
First Principles
Formulas
f'(x) = lim_{h -> 0} [(f(x+h) - f(x)) / h]
f(x) = 1/(x-1)
f'(x) = -1/(x-1)^2
Theorems
Limit Definition of the Derivative
Suitable Grade Level
Grades 11-12, College Level